A Comprehensive Inflation Solution. Inflationary pressure can rise without warning and can be triggered by many factors. Strategic Inflation Opportunities can help investors be prepared for a range of economic scenarios with a comprehensive approach that’s designed to help preserve purchasing power.

Data reflects past performance for Investor Class shares, assumes reinvestment of dividends and capital gains and is no guarantee of future results. Current performance may be higher or lower than data shown. Investment return and principal value fluctuates. Redemption value may be more or less than original cost. Obtain performance data current to the most recent month end. For additional share class information, consult the prospectus.Extraordinary performance is attributable in part to unusually favorable market conditions and may not be repeated or consistently achieved in the future.

The value of the fund's shares may fluctuate significantly in the short term. At any given time your shares may be worth less than the price you paid for them. Since inflation-indexed securities trade at prevailing real, or after-inflation, interest rates, changes in these rates affect the value of such securities owned by the fund. Generally, when real interest rates rise, the value of these securities will decline. The opposite is true when real interest rates decline. Debt securities also are subject to credit risk. Investment in debt securities issued by entities other than the U.S. Treasury or U.S. government and its agencies may increase the potential credit risk associated with the fund. The fund's commodity-related investments may be subject to greater volatility than investments in traditional securities. Investing in foreign securities has certain unique risks that make it generally riskier than investing in U.S. securities. Investing in securities of issuers located in emerging market countries generally is riskier than investing in securities of companies located in foreign developed countries. The fund is classified as non-diversified; therefore, it may be more volatile than if it was diversified.

W2 If your account falls below the minimum balance, you will be notified and given 90 days to meet the minimum. If the deadline is not met, American Century Investments may redeem the shares in the account and send the proceeds to the address of record.

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Expense ratios provided are the funds' total annual operating expense ratios, gross of any fee waivers or expense reimbursements. Expense ratios are as of the funds' most current prospectus.

You should consider the fund's investment objectives, risks, charges and expenses carefully before you invest. The fund's prospectus or summary prospectus, which can be obtained by calling 1.800.345.2021, contains this and other information about the fund, and should be read carefully before investing. Investments are subject to market risk.